LevelDB: A Fast Persistent Key-Value Store - Google Open Source Blog: "LevelDB is a fast key-value storage engine written at Google that provides an ordered mapping from string keys to string values. We are pleased to announce that we are open sourcing LevelDB under a BSD-style license.
LevelDB is a C++ library that can be used in many contexts. For example, LevelDB may be used by a web browser to store a cache of recently accessed web pages, or by an operating system to store the list of installed packages and package dependencies, or by an application to store user preference settings. We designed LevelDB to also be useful as a building block for higher-level storage systems. Upcoming versions of the Chrome browser include an implementation of the IndexedDB HTML5 API that is built on top of LevelDB. Google's Bigtable manages millions of tablets where the contents of a particular tablet are represented by a precursor to LevelDB. The Riak distributed database has added support for using LevelDB for its per-node storage."
